Third emporer of Rome. Sick mofo. Also kinda really crazy. Committed incest with his three sisters. Whenever he kissed one of his lovers, he said "This lovely neck will be chopped as soon as I say so."
An extraordinarily slow operating system that is very secure. The closest Windows comes to it in terms of not crashing is Windows 2000 Pro. But basically all Windows operating systems since 3.1 are better than anything Mac has made.
Pick your poison, an os that never crashes but never lets you get anything done or an os that you can use that may crash every once in awhile.